Re: Dry Ice
CO2 inhalation will cause damage that you cannot see.
Inhalation of CO2 is dangerous regardless of the amount. I could get into the ppm it takes to cause damage but it's not worth it right now. The bottom line is that you should never do it.
Putting dry ice into the base would ruin the point of the hookah anyway because it would sublimate into gas too quickly and constantly create positive pressure in the base. This would make it impossible to actually draw through the hose and you would not get any smoke out of the bowl.
I also want to make it clear that any mention of anything illegal or otherwise against our rules is not going to be tolerated. I have already had to edit posts and issue warnings. Consider this a reminder.